﻿using System;
using System.Drawing;

namespace Test
{
    class Program
    {
        static void Main(string[] args)
        {

        }
    }


    public abstract class Fruit 
    {

        public static readonly Apple apple = new Apple();



        public int color;
        private double size;
        internal double money;
        protected double weight;




        //属性
        public int Color { get { return color; }set { color = value; } }
        public double Size { get { return size; } set { size = value; } }
        public double Money { get; set; }
        public double Weight { get; set; }



        public abstract void Eat();


    }


    internal sealed class Pet
    {
       
    }

    public class Apple
    {

    }


}
